Temperature-Dependent Conformational Change of PNIPAM Grafted Chains at High Surface Density in Water

Journal Article

The use of neutron reflectivity to study the conformational change of poly(N-isopropylacrylamide) (PNIPAM) chains grafted at high surface density in water was investigated. It was observed that PNIPAM exhibits a lower critical solution temperature (LCST) of about 30° C in water that is attributed to alterations in the hydrogen bonding interactions of the amide group. As the temperature passed through the LCST, a strong contraction was observed. The results support the basis of a concentration dependent parameter for PNIPAM in water although polydispersity was not ruled out as a contributing factor.

Full Text

Cited Authors

  • Yim, H; Kent, MS; Mendez, S; Balamurugan, SS; Balamurugan, S; Lopez, GP; Satija, S

Published Date

  • 2004

Published In

Volume / Issue

  • 37 / 5

Start / End Page

  • 1994 - 1997

International Standard Serial Number (ISSN)

  • 0024-9297

Digital Object Identifier (DOI)

  • 10.1021/ma0354290